800w Gaming Series Corsair

^ what the title says (800w Gaming series corsair) is it powerful enough for my future 5830 crossfired with i7-950 at 4.2 ghz at 1.35vcore my ambients are about. 37-37-39-39 nd load 61s to 65s *IBT Benchmarks*

I heard these cards run cooler than what I RMAed them for (4890s) hopefully im better off all i can read about on google is how the 4890s beat it in DX10 all day.